Home / 81,048.18-121,489.11-31,114.83

Finding the Fourth Proportional to 81,048.18, 121,489.11 and 31,114.83

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Solution

The fourth proportional to 81,048.18, 121,489.11 and 31,114.83 is: 46,640.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,048.18 : 121,489.11 = 31,114.83 : x
  2. Step 2: Convert to fraction form
    81,048.18/121,489.11 = 31,114.83/x
  3. Step 3: Cross multiply
    81,048.18x = 121,489.11 × 31,114.83
  4. Step 4: Simplify right side
    81,048.18x = 3,780,113,004.50
  5. Step 5: Solve for x
    x = 3,780,113,004.50/81,048.18
  6. Step 6: Final answer
    x = 46,640.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.